package com.micro.educenter.mapper;

import com.micro.educenter.entity.UcenterMember;
import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import org.apache.ibatis.annotations.Param;


public interface UcenterMemberMapper extends BaseMapper<UcenterMember>  {
     //查询某一天注册人数
     Integer countRegisterDay(String day);
}